Which of the following is a beneficial reason to extract mineral resources from the earth? 1) it can contaminate water supplies. 2) it depletes the supply. 3) it increases surface runoff. 4) it makes the resource available for use.

1. in what ways have non-native species been beneficial? 2. what are some of the hypotheses for the collapse of honeybee colonies? 3. distinguish between regional and functional extinction. 4. why is it difficult to measure background extinction rates? 5. what three factors are most important in causing extinction rates to climb?